import Vue from 'vue'
import Router from 'vue-router'
import routes from './routers'
import store from '@/store'
import ViewUI from 'view-design'
import {
  getToken,
  removeToken,
  canTurnTo,
  setTitle
} from '@/libs/util'
import config from '@/config'

const {
  homeName
} = config

Vue.use(Router)

// 解决多次点击路由时，抛出NavigationDuplicated异常
const originalPush = Router.prototype.push
Router.prototype.push = function push(location) {
  return originalPush.call(this, location).catch(err => err)
}
// 解决多次点击路由时，抛出NavigationDuplicated异常

const router = new Router({
  routes,
  mode: 'hash'
})
const LOGIN_PAGE_NAME = 'login'

const turnTo = (to, access, next) => {
  if (canTurnTo(to.name, access, routes)) next() // 有权限，可访问
  else next({
    replace: true,
    name: 'error_401'
  }) // 无权限，重定向到401页面
}

router.beforeEach((to, from, next) => {
  ViewUI.LoadingBar.start()
  const token = getToken()
  if (to.name === 'report') {
    next()
    ViewUI.LoadingBar.finish()
  } else if (!token && to.name !== LOGIN_PAGE_NAME) {
    // 未登录且要跳转的页面不是登录页
    next({
      name: LOGIN_PAGE_NAME // 跳转到登录页
    })
  } else if (!token && to.name === LOGIN_PAGE_NAME) {
    // 未登陆且要跳转的页面是登录页
    next() // 跳转
  } else if (token && to.name === LOGIN_PAGE_NAME) {
    // 已登录且要跳转的页面是登录页
    next({
      name: homeName // 跳转到homeName页
    })
  } else {
    if (store.state.permission.isLocked && to.name !== 'lockscreen') {
      next({
        name: "lockscreen"
      })
      ViewUI.LoadingBar.finish()
    } else {
      if (store.state.user.hasGetInfo) {
        turnTo(to, store.state.user.access, next)
      } else {
        store.dispatch('getUser').then(user => {
          // 拉取用户信息，通过用户权限和跳转的页面的name来判断是否有权限访问;access必须是一个数组
          turnTo(to, user.access, next)
        }).catch(() => {
          removeToken()
          next({
            name: 'login'
          })
        })
      }
    }
  }
})

router.afterEach(to => {
  setTitle(to, router.app)
  ViewUI.LoadingBar.finish()
  window.scrollTo(0, 0)
})

export default router
